<d-row  dJustify="center">
  <input placeholder="请输入账户" [(ngModel)]="username" />
</d-row >
<d-row  dJustify="center">
  <input type="password"  placeholder="请输入密码" [(ngModel)]="password" />
</d-row>
<d-row  dJustify="center">
  <d-button (click)="doRegister()">注册</d-button>
</d-row>

